docs: def initial_sql(self, value):
          """Set the connection's initial_sql property.
  
          Args:
              value:  New initial_sql value. String.
  
          Returns:
              Nothing.
          """
  
          self._initial_sql = value
          # If initial_sql is None we remove the element and don't write it to XML
          if value is None:
              try:
                  del self._connectionXML.attrib['one-time-sql']
              except KeyError:
                  pass
          else:
              self._connectionXML.set('one-time-sql', value)